Kelunji Gecko

designed by the seismology research centre

3-channel data loggers, velocity seismometers and accelerometers

The Range

There are six Gecko models. Which is right for you?
Gecko Compact
Gecko Compact
A fully featured recorder at an affordable price in a tiny package
The Compact is our original low-power recorder in a small and light chassis designed for installation inside vaults or instrument enclosures. Configured through the LCD with a simple 4-button keypad – no laptop required!
Gecko Rugged
Gecko Rugged
A waterproof version for when you need to install your Gecko outdoors
Connect any seismic sensor you like to this beautifully engineered chassis which can be left outdoors for blast monitoring or survey work. With an integrated LCD and buttons for setup, simply remove the SD card to see your continuous data. Optional 24+ hour internal battery.
Gecko Blast
Gecko Blast
An easy-to-use all-in-one blast monitor with internal triaxial 4.5Hz geophones
Sit it down and turn it on. It’s that simple to record data vibrations continuously for months. Monitor blasts, construction and demolition works, or any other large near field vibrations. Perfect for compliance monitoring applications.
Gecko SMA
Gecko SMA
When you need to record high range peak ground acceleration
The entry-level Strong Motion Accelerograph is a compact all-in-one recorder and sensor package that is simple to install. Monitor dams, buildings, or any structure that at risk to strong motion earthquake damage. Available with ±2 to ±400g sensors, the Gecko SMA is also suitable for near field blast monitoring.
Gecko SMA-HR
Gecko SMA-HR
The perfect structural monitoring strong motion accelerograph
A low noise, high resolution all-in-one accelerograph designed for building response and health monitoring. The wide dynamic range of the force feedback sensor allows for natural frequency and modal response analysis.
Gecko Helix
Gecko Helix
An all-in-one waterproof portable seismograph with 1-100Hz bandwidth
An extremely low power short period seismograph designed for local earthquake monitoring networks and aftershock monitoring applications. Available with an internal battery for 24+ hours of operation without a charger – ideal for rapid deployment.
Gecko Prism
Gecko Prism
Portable Rugged Interferometry SeisMograph: 30sec to 80Hz
A totally new approach to sensing long period ground motion. Incredible sensitivity at a fraction of the cost and power of traditional broadband seismometers. Ideal for portable surveys and permanent broadband stations. Click link below for data sheet.
Gecko Data Sheet
Gecko Data Sheet
Click the icon below to download the data sheet on the Gecko range

Technical Specifications

The Gecko is all about class-leading user experience, but it has the performance to match. Here's an overview of the tech specs.

32-bit ADC

  • 3 channels, 40VPP input range
  • Gain options: x1 x2 x4 x8 ... x256
  • Dynamic Range 143dB @100sps, 135dB @500sps (FS-RMS noise)
  • Sample rates: 40, 100, 200, 250, 400, 500, 800, 1000, 1600, 2000, and 4000 samples per second
  • Power: 7-30V DC, only 0.9W
  • LCD and 4-button keypad for setup - no laptop required!


  • Continuous data always recording to ring buffer
  • MiniSEED data format and system information text files
  • Internal GPS receiver timestamps data every second ensuring data is within 10 microseconds of UTC
  • Trigger logging using Level and STA/LTA algorithms
  • State of Health logging

Data Archive

  • 32GB removable SD card storage (SDHC or microSD with adaptor)
  • 12+ month recording @ 100sps
  • Two trigger/SOH alarm outputs
  • Ethernet adaptor available
  • 3G cellular modem available
  • Included application software: Waves for waveform analysis; Live Stream for real time display and data archiving, Gecko setup

Features & Price

Choose a Gecko for your application.

Vaults & Enclosures

Light, portable, affordable recorder


  • Fully featured recorder
  • Supports all seismic sensors
  • Telemetry & Alarm outputs
  • Removable SD card storage
  • IP54 rated case
price: ☆

Outdoor Applications

Fully weatherproof recorder


  • Connect any sensor
  • Internal 24+ hour battery
  • Removable SD card storage
  • Beautiful aluminium body
  • IP67 dust & water resistant
price: ☆✩

Blast & vibration

4.5Hz triaxial geophone


  • All-in-one weatherproof design
  • Months of continuous recording
  • Robust 4.5Hz passive elements
  • Optional battery/alarm case
  • Optional streaming 3G modem
price: ☆✩

Strong Motion

±2g or ±5g accelerograph


  • For Peak Ground Acceleration
  • 300µg noise level (±2g version)
  • Triaxial MEMS tech sensor
  • 7-30V DC power input
  • IP67, central bolt mounting
price: ☆☆

Structural Health

±2g or ±4g hi-res accelerograph


  • Natural Period & Modal Analysis
  • < 1µg noise level (±2g version)
  • Triaxial Force Feedback sensor
  • Includes 12+ hour battery
  • IP67, central bolt mounting
price: ☆☆✩


1Hz to 100Hz low noise seismometer


  • Rapid Deployment Microseismic
  • < 50nm/s noise, ±8.75mm/s clip
  • Triaxial coil velocity elements
  • Internal 24+hr internal battery
  • IP67 for outdoor installation
price: ☆☆☆

teleseismic, survey

30s to 80Hz broadband seismometer


  • Portable Broadband Survey
  • 30sec to 80Hz flat response
  • Noise under NLNM 1 to 10 sec
  • 3D laser optic interferometer
  • Internal 24+hr internal battery
price: ☆☆☆✩

History of Kelunji Seismographs

"Kelunji" is an Aboriginal word for a small cockatoo known locally as a "galah" - also an Australian euphemism that reflects some traits of our seismologists 😉

Starting in the late 1970s, our first generation digital recorders, the Alpha and Beta, used cassette tapes for triggered data recording. The first recorder known as "Kelunji" is now referred to as the Classic, and was our first to use solid state memory (1MB!). This was followed by the D-series and 24-bit Echo that used high volume CompactFlash Card storage, with the EchoPro (and briefly Fusion) moving to USB data storage. Following the ABCDEF nomenclature, our 7th generation "G" recorder recalls the Echo name and its core values of user-friendliness and continuous recording.
Of course our latest recorder needed to use the latest technology, which includes 32-bit ADC chips and other components that enables the Gecko to use a fraction of the power of previous generation machines.
As always, the Gecko supports sensors from any and all manufacturers: be they geophones or microphones; blast or earthquake accelerometers; or short period to broadband seismometers.
Our technology doesn't end at the recorder - we have developed data telemetry solutions, network management and data display software, and data analysis and alerting applications. The Gecko is just the first step in the complete seismic monitoring solution developed by the Seismology Research Centre and manufactured by ESS Earth Sciences.

Need more information?

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